Antenna device, RFID (Radio Frequency Identification Device) equipment and RFID tag identification method

Abstract

The invention provides an antenna device, RFID (Radio Frequency Identification) equipment and an RFID tag identification method. The antenna device comprises a vertical rotating structure, a horizontal moving structure, a first stepping motor, a second stepping motor, a third stepping motor, a connecting structure and an RFID antenna, the first end of the horizontal moving structure is movably connected with the first end of the vertical rotating structure, the first end of the connecting structure is fixed to the horizontal moving structure, and the second end of the horizontal moving structure is movably connected with the first end of the vertical rotating structure. The RFID antenna is installed at the second end of the connecting structure, the first stepping motor drives the second end of the vertical rotating structure to rotate, the second stepping motor drives the first end of the horizontal moving structure to rotate, and the third stepping motor drives the horizontal moving structure to move. According to the scheme, the problem that antennas of adjacent conveyor belts are easy to interfere with each other in the existing RFID identification technology is solved.

Description

Technical Field

[0001] The present application relates to the field of automatic identification technology, and in particular to an antenna device, an RFID device, and an RFID tag identification method. Background Art

[0002] The factory production line uses a set of high-frequency RFID identification equipment to realize process position identification and binding. The whole set of equipment includes RFID readers, antennas and tags.

[0003] The current solution is to install a set of RFID readers and antennas for each conveyor belt. When the antennas of adjacent conveyor belts are installed close to each other, the antenna signals will generate crosstalk and cause misreading. Summary of the invention

[0004] The main purpose of the present application is to provide an antenna device, an RFID device and an RFID tag identification method, so as to at least solve the problem that antennas of adjacent conveyor belts are prone to interfere with each other in the current RFID identification technology.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an antenna device is provided, including: a vertical rotation structure, a horizontal movement structure, a first stepper motor, a second stepper motor, a third stepper motor, a connecting structure and an RFID antenna, wherein the first end of the horizontal movement structure is movably connected to the first end of the vertical rotation structure, the first end of the connecting structure is fixed on the horizontal movement structure, the RFID antenna is installed at the second end of the connecting structure, the first stepper motor drives the second end of the vertical rotation structure to rotate, the second stepper motor drives the first end of the horizontal movement structure to rotate, and the third stepper motor drives the horizontal movement structure to move.

[0006] Optionally, the antenna device further includes: a first gear and a second gear meshing with each other, the first gear being mounted at the bottom of the horizontal moving structure, and the third stepping motor driving the second gear to rotate to drive the first gear to drive the horizontal moving structure to move.

[0007] Optionally, the connection structure is a retractable structure.

[0008] According to another aspect of the present application, there is provided an RFID device, comprising: any one of the antenna devices described above, installed between two adjacent conveyor belts; an RFID tag, placed in a process board on the conveyor belt; a process board in-place detection sensor, used to detect the in-place status of the process board; a light sensor, used to detect the placement position of the RFID tag; and a host computer, communicating with the antenna device and the process board in-place detection sensor, respectively, and configured to obtain tag information and perform related processing on the tag information.

[0009] Optionally, there are multiple light sensors, and the multiple light sensors are respectively placed at multiple positions where RFID tags are pre-placed.

[0010] According to another aspect of the present application, a method for RFID tag identification using the RFID device is provided, comprising: receiving a detection signal of a process board arrival detection sensor, and when the detection signal indicates that a process board has passed, controlling a second stepper motor to drive a first end of a horizontal moving structure to rotate according to a position of a conveyor belt where the process board is located, so that the RFID antenna faces the conveyor belt on the side where the process board is located; receiving a sensing signal of a light sensor, and controlling a first stepper motor to drive a second end of a vertical rotating structure to rotate and / or a third stepper motor to drive the horizontal moving structure to move according to the sensing signal so that the RFID antenna is aligned with the RFID tag; obtaining a tag signal strength value of the RFID tag, and determining whether the tag information is complete and binding the RFID tag to a process position if the tag information is complete.

[0011] Optionally, determining whether the tag information is complete includes: obtaining a benchmark tag signal strength value; determining that the tag information is complete when the tag signal strength value of the RFID tag is greater than or equal to the benchmark tag signal strength value; and indicating that a probability that the tag information is incomplete is greater than a preset probability when the tag signal strength value of the RFID tag is less than the benchmark tag signal strength value.

[0012] Optionally, the connecting structure is a retractable structure, and after detecting that the tag signal strength value of the RFID tag is less than the benchmark tag signal strength value, the method further includes: a control comparison step: controlling the retractable structure to extend a preset step length to obtain the tag signal strength value again, and comparing the tag signal strength value with the benchmark tag signal strength value; executing the control comparison step at least once until the tag signal strength value is greater than or equal to the benchmark tag signal strength value, or, when the number of executions reaches a threshold number and still does not satisfy the condition that the tag signal strength value is greater than or equal to the benchmark tag signal strength value, a prompt message is generated, and the prompt message indicates a binding failure.

[0013] Optionally, when the tag information is complete, the RFID tag is bound to the process position, including: determining whether the placement position of the RFID tag corresponds to the obtained commodity type code, and if so, continuing to compare whether the brand codes are consistent, and binding the RFID tag to the process position if the brand codes are consistent.

[0014] Optionally, the method further includes: indicating a binding failure when the commodity type code is inconsistent with a reference commodity type, and / or the brand code is inconsistent with a reference commodity brand, wherein the reference commodity type corresponds to a placement position of the RFID tag.

[0015] Applying the technical solution of the present application, the antenna device includes a vertical rotating structure, a horizontal moving structure, a first stepper motor, a second stepper motor, a third stepper motor, a connecting structure and an RFID antenna, wherein the first end of the horizontal moving structure is movably connected to the first end of the vertical rotating structure, the first end of the connecting structure is fixed on the horizontal moving structure, the RFID antenna is installed on the second end of the connecting structure, the first stepper motor drives the second end of the vertical rotating structure to rotate, the second stepper motor drives the first end of the horizontal moving structure to rotate, and the third stepper motor drives the horizontal moving structure to move. This solution solves the problem that the antennas of adjacent conveyor belts are prone to mutual interference in the current RFID identification technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A schematic structural diagram of an antenna device provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic diagram of an antenna device provided in an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of dividing the process board label placement area according to a method for RFID label recognition provided in an embodiment of the present application is shown;

[0020] Figure 4 A control flow chart of a method for identifying an RFID tag provided according to an embodiment of the present application is shown;

[0021] Figure 5 A schematic diagram of a device for RFID tag identification provided according to an embodiment of the present application is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. Antenna device; 11. Vertical rotation structure; 12. Horizontal movement structure; 13. First stepper motor; 14. Second stepper motor; 15. Third stepper motor; 16. Connection structure; 17. RFID antenna; 18. First gear; 19. Second gear; 20. Rotation axis. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] As introduced in the background technology, in the prior art, a set of RFID readers and antennas are installed for each conveyor belt. When the antennas of adjacent conveyor belts are installed close to each other, the antenna signals will produce crosstalk and cause misreading. In order to solve the problem that the antennas of adjacent conveyor belts are prone to interfere with each other in RFID identification technology, the embodiments of the present application provide an antenna device, an RFID device and an RFID tag identification method.

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Figure 1 is a schematic diagram of an antenna device provided in an embodiment of the present application. Figure 1As shown, the antenna device 10 includes: a vertical rotation structure 11, a horizontal movement structure 12, a first stepper motor 13, a second stepper motor 14, a third stepper motor 15, a connecting structure 16 and an RFID antenna 17, wherein the first end of the horizontal movement structure 12 is movably connected to the first end of the vertical rotation structure 11, the first end of the connecting structure 16 is fixed on the horizontal movement structure 12, the RFID antenna 17 is installed on the second end of the connecting structure 16, the first stepper motor 13 drives the second end of the vertical rotation structure 11 to rotate, the second stepper motor 14 drives the first end of the horizontal movement structure 12 to rotate, and the third stepper motor 15 drives the horizontal movement structure 12 to move.

[0030] Specifically, the antenna device is intended to achieve precise movement and rotation of the RFID antenna in three-dimensional space to improve the recognition efficiency and accuracy of the RFID tag. Figure 2 As shown, the specific components and functions of the antenna device 10 are as follows:

[0031] Vertical rotation structure 11: This part of the structure allows the RFID antenna to rotate in the vertical direction, ensuring that the antenna can face different conveyor belts or identification areas, thereby avoiding signal crosstalk and misreading.

[0032] Horizontal moving structure 12: This part of the structure allows the RFID antenna to move in the horizontal direction, ensuring that the antenna can be aligned with tags at different positions on the process board, thereby improving the flexibility and coverage of identification.

[0033] The first stepper motor 13 drives the second end of the vertical rotating structure to rotate, so as to adjust the angle of the antenna in the vertical direction. The stepper motor is very suitable for automatic control devices because of its precise control ability and ability to achieve small position movement.

[0034] The second stepper motor 14 drives the first end of the horizontal moving structure to rotate, so as to adjust the angle of the antenna in the horizontal direction, and further enhance the alignment capability of the antenna and the accuracy of signal reception. Specifically, the first end of the horizontal moving structure is rotated to align with the conveyor belt on the left side, or the second end of the horizontal moving structure is rotated to align with the conveyor belt on the right side.

[0035] The third stepper motor 15 drives the horizontal moving structure to move, so as to adjust the position of the antenna in the horizontal direction, and ensure that the antenna can be aligned with the labels on different process boards, even if their positions are different in the horizontal direction.

[0036] The connecting structure 16 is fixed on the horizontal moving structure, and its second end is used to install the RFID antenna. The connecting structure provides a stable connection between the antenna and the moving and rotating structure, ensuring that the antenna can move and rotate stably.

[0037] RFID antenna 17: installed at the second end of the connecting structure, it is the core part of the whole device, used for transmitting and receiving radio frequency signals and reading the information on the RFID tag.

[0038] More specifically, a stepper motor is a motor that converts electrical pulse signals into linear or rotary motion. The core characteristics of a stepper motor include:

[0039] Rotation in steps: The stepper motor does not rotate continuously, but in steps. Each time it receives an electrical pulse, the motor rotates a fixed angle, called a step. This angle can be from a few degrees to dozens of degrees, depending on the design of the motor.

[0040] Precise position control: Since the rotation angle of the stepper motor is directly related to the number of input pulses, the rotation angle and position of the motor can be controlled by precisely controlling the number of pulses to achieve high-precision positioning.

[0041] Open-loop control capability: Stepper motors usually use an open-loop control system, which means that the motor is driven by directly controlling the pulse signal, and precise position control can be achieved without a feedback device. This simplifies the control system and reduces costs.

[0042] Lock at rest: When the stepper motor does not receive a pulse signal, it will remain in the current position. This feature allows the stepper motor to remain stable in positioning applications without the need for additional brakes.

[0043] Torque-speed characteristics: Stepper motors can provide high torque at low speeds, but as speed increases, the torque drops. Therefore, they are best used in situations where low speed, high torque, or precise control is required.

[0044] Step angle and resolution: The step angle of a stepper motor refers to the angle of rotation for each step. The resolution of a motor refers to the smallest position increment that the motor can achieve. The higher the resolution, the more precise the position control.

[0045] Stepper motors are widely used in automation equipment. In this antenna device, the stepper motor is used to accurately control the rotation and movement of the antenna in the vertical and horizontal directions, ensuring that the antenna can accurately align with the target tag and improve the accuracy and efficiency of recognition.

[0046] like Figure 2As shown, the antenna device 10 further includes a rotating shaft 20. Specifically, the rotating shaft is a key component connecting different structural components, which allows relative rotational movement between the components, thereby achieving precise positioning of the RFID antenna in three-dimensional space. The rotating shaft is located in the vertical rotating structure, so that the entire structure can rotate vertically around its axis. The first stepper motor can control the angle adjustment of the antenna in the vertical direction by driving this rotating shaft, ensuring that the antenna can face different conveyor belts.

[0047] The entire antenna device controls the movement and rotation of the antenna in three-dimensional space through three stepper motors, realizing automatic and precise alignment and identification of RFID tags, improving the efficiency and accuracy of identification, and reducing the need for manual intervention. It is suitable for RFID identification tasks on automated production lines, optimizing the production process and improving production efficiency.

[0048] During the specific implementation process, the antenna device also includes: a first gear and a second gear that mesh with each other, the first gear is installed at the bottom of the horizontal moving structure, and the third stepper motor drives the second gear to rotate to drive the first gear to drive the horizontal moving structure to move.

[0049] Specifically, the antenna device has a gear transmission structure to achieve precise movement of the horizontal moving structure, such as Figure 2 As shown, specifically including:

[0050] The first gear 18 is installed at the bottom of the horizontal moving structure, and its function is to convert the rotational motion of the motor into the linear motion of the horizontal moving structure. The first gear is tightly combined with the horizontal moving structure to ensure that when the gear rotates, the horizontal moving structure can move accordingly.

[0051] The second gear 19 is meshed with the first gear, and usually the two gears form a gear pair, and the motion is transmitted through the meshing between the gears. The second gear is driven by the third stepper motor, and when the third stepper motor rotates, it drives the second gear to rotate synchronously.

[0052] The second gear is driven by the third stepper motor, and the second gear is meshed with the first gear to convert the rotational force into the rotation of the first gear, and the rotation of the first gear drives the horizontal moving structure to perform precise linear movement in the horizontal direction. This transmission mechanism utilizes the high precision and high efficiency of gear transmission, can achieve micro-position adjustment of the antenna, and improve the recognition accuracy of the RFID antenna to the tag.

[0053] The stepping characteristics of the stepper motor (i.e., it can accurately move a fixed angle each time) and the high-precision combination of the gear transmission allow the antenna to be accurately controlled in the horizontal direction, ensuring that it is in place even if the moving distance is very small. By adding a gear transmission structure, the antenna device can be more stable and accurate when moving horizontally, improving the recognition efficiency and accuracy of the RFID antenna, and further optimizing the automation process on the production line. This design can also reduce wear, extend the service life of the device, and reduce maintenance costs.

[0054] In the specific implementation process, the above connection structure is a retractable structure.

[0055] Specifically, the connection structure is designed as a retractable structure, that is, the length of the connection structure can be adjusted within a certain range, and it can be extended or shortened as needed, thereby adjusting the distance from the RFID antenna to the target tag. When identifying an RFID tag, the distance between the antenna and the tag is a key parameter that affects the signal strength and the accuracy of recognition. The retractable connection structure allows the antenna device to automatically adjust the distance during the recognition process, ensuring that the antenna can read the tag within the optimal distance range, improving the recognition rate and reducing misreading. In addition, this design increases the flexibility of the device and can adapt to process boards or tags of different sizes. Even if the position of the tag changes slightly, the antenna can be aligned by telescoping, avoiding recognition failures caused by inappropriate distances. By combining with the control of a stepper motor, the retractable structure can be automatically retracted and extended by a motor drive without the need for manual intervention, further improving the automation and efficiency of the production line.

[0056] The present application also provides an RFID device, including:

[0057] Any of the above antenna devices is installed between two adjacent conveyor belts;

[0058] An RFID tag is placed in the process board on the conveyor belt; a process board in-place detection sensor is used to detect the process board in-place;

[0059] A light sensor, used to detect the placement position of the above RFID tag;

[0060] The host computer communicates with the antenna device and the process board arrival detection sensor respectively, and is configured to obtain the tag information and process the tag information.

[0061] Specifically, the RFID device is an integrated system designed to improve the accuracy and efficiency of RFID tag recognition, reduce errors and improve production efficiency by optimizing antenna positioning and automating the recognition process. Its key features and components are as follows:

[0062] Antenna device: The antenna device is installed between two adjacent conveyor belts and can automatically adjust the angle and distance to align the RFID tag on the process board in the best way to avoid signal interference and improve the recognition rate.

[0063] RFID tag: placed inside the process board, used to store product information, and read and write information through non-contact signal transmission and reception via the RFID reader (part of the antenna device).

[0064] Process board in place detection sensor: used to detect in real time whether the process board has reached the identification area of ​​the RFID device. When the sensor detects that the process board is in place, it will trigger the host computer to perform the next operation, such as adjusting the antenna position and reading the tag information.

[0065] Light sensor: Installed in the label placement area of ​​the process board, used to detect the precise position of the RFID tag. When the tag blocks the light sensor, the sensor sends a signal to the host computer to indicate the placement of the tag so that the antenna device can accurately align with the tag.

[0066] Host computer: As the control center of the whole system, it communicates with the antenna device and the process board arrival detection sensor, receives the signal sent by the sensor, controls the action of the antenna device according to the signal information, reads the RFID tag information, and processes the information, such as verification, recording or further data analysis.

[0067] The entire RFID equipment forms a closed-loop identification system through the automatic adjustment of the antenna device, real-time detection of the sensor and intelligent control of the host computer. It can not only automatically identify and read RFID tags, but also adjust the position and direction of the antenna according to the signal strength and location information of the tag, avoiding the common signal interference and recognition omission problems in traditional RFID systems, improving the automation level and work efficiency of the production line, and also reducing the maintenance cost of the equipment and the need for manual intervention.

[0068] In a specific implementation process, there are a plurality of the light sensors, and the plurality of light sensors are respectively placed at a plurality of positions where the RFID tags are pre-placed.

[0069] Specifically, when the process board carries the product through the RFID device, the light sensor can monitor these preset positions in real time. If the light at a certain position is blocked by the RFID tag, the sensor will detect it immediately and send this position information to the host computer. Through the cooperation of multiple light sensors, the system can quickly determine the exact position of the tag, so that the antenna device can adjust the direction and distance more accurately, improving the recognition efficiency and accuracy of the RFID tag. If there should be a tag at a preset position but the light sensor does not detect the blockage, this may mean that the tag is not placed or placed incorrectly. The host computer can record this abnormal situation and notify the staff to handle it through an alarm or other means. By configuring multiple light sensors at multiple positions where the RFID tags are pre-placed, the RFID device can accurately detect the position of the RFID tag when the process board passes, ensuring that the antenna device is accurately aligned with the tag, thereby improving the efficiency and accuracy of RFID recognition, reducing recognition errors caused by improper label position on the production line, and further improving the automation level and efficiency of the production line.

[0070] The embodiment of the present application also provides a method for RFID tag identification using the above-mentioned RFID device, including: receiving a detection signal from a process board arrival detection sensor, and when the above-mentioned detection signal indicates that a process board has passed, controlling the second stepper motor to drive the first end of the horizontal moving structure to rotate according to the position of the conveyor belt where the above-mentioned process board is located, so that the RFID antenna faces the conveyor belt on the side where the process board is located; receiving a sensing signal from a light sensor, and controlling the first stepper motor to drive the second end of the vertical rotating structure to rotate and / or the third stepper motor to drive the above-mentioned horizontal moving structure to move according to the above-mentioned sensing signal so that the above-mentioned RFID antenna is aligned with the RFID tag; obtaining the tag signal strength value of the above-mentioned RFID tag, and determining whether the tag information is complete and binding the above-mentioned RFID tag to the process position if the above-mentioned tag information is complete.

[0071] Specifically, first, the host computer in the RFID device receives detection signals from the process board in place detection sensor, which indicates whether there is a process board passing through the RFID device identification area. When the detection signal confirms that there is a process board, the host computer controls the second stepper motor to drive the first end of the horizontal moving structure of the antenna device to rotate according to the conveyor belt position (left or right) where the process board is located, ensuring that the RFID antenna faces the side of the conveyor belt where the process board is located to prepare for the identification of the RFID tag. The host computer also receives sensing signals from light sensors, which are distributed in the preset RFID tag placement area on the process board to detect whether the tag is placed in place and the specific position. According to the signal sent by the light sensor, the host computer controls the first stepper motor to drive the second end of the vertical rotating structure to rotate, and the third stepper motor to drive the horizontal moving structure to move, accurately adjusting the relative position of the RFID antenna and the RFID tag, so that the antenna can be accurately aligned with the tag to ensure the best reception of the signal. The host computer reads the signal strength value of the RFID tag, and the signal strength reflects the quality of communication between the RFID antenna and the tag. Then, the host computer determines whether the RFID tag information is complete based on the signal strength value. If the tag information is complete (that is, the signal strength is sufficient and the tag data is readable), the RFID tag is bound to the process position of the process board to complete the reading of the tag information and the recording of the product process flow; if the tag information is incomplete, the system may take remedial measures, such as adjusting the antenna position and trying again, or marking the tag as abnormal and notifying manual inspection.

[0072] This method uses the host computer to intelligently control the stepper motor to drive the antenna device and uses the light sensor to assist in positioning, thus realizing the automatic recognition and binding of RFID tags. This method improves the automation of RFID tag recognition, reduces recognition errors caused by signal interference or inaccurate tag position, and reduces the need for manual intervention, greatly improving the efficiency and accuracy of the production line.

[0073] During the specific implementation process, determining whether the above-mentioned tag information is complete includes: obtaining a benchmark tag signal strength value; when the above-mentioned tag signal strength value of the above-mentioned RFID tag is greater than or equal to the above-mentioned benchmark tag signal strength value, determining that the above-mentioned tag information is complete; when the above-mentioned tag signal strength value of the above-mentioned RFID tag is less than the above-mentioned benchmark tag signal strength value, indicating that the probability of incompleteness of the above-mentioned tag information is greater than a preset probability.

[0074] Specifically, first, the system needs to obtain a benchmark tag signal strength value, select several tags and put them into the tag placement area of ​​the process board, read out the signal strength values ​​R1, R2, ..., Rn of n tags in turn, and calculate the average value, that is, the benchmark tag signal strength value R = (R1 + R2 + ... + Rn) / n. Obtaining the benchmark signal strength value is the basis for evaluating the integrity of the current RFID tag information. The system compares the signal strength value of the current RFID tag read with the benchmark signal strength value. If the signal strength value of the current tag is greater than or equal to the benchmark value, it indicates that the communication quality between the RFID antenna and the tag is good and the data transmission is not significantly disturbed. When the signal strength meets the benchmark condition (i.e., greater than or equal to the benchmark value), the system determines that the RFID tag information is complete and can be further processed and bound to the process, which means that the tag data can be read and parsed accurately without missing or damaged data; on the contrary, if the current RFID tag signal strength value is less than the benchmark signal strength value, the system evaluates the probability that the tag information is incomplete. This evaluation is based on the statistical relationship between signal strength and data integrity. The preset probability may be a threshold set by experience or testing to determine to what extent the signal strength is reduced, the possibility of incomplete information will exceed the acceptable range, that is, when the signal strength is relatively low, it is not necessarily incomplete, but the probability of incompleteness is relatively high. If the estimated probability of incomplete information is greater than the preset probability threshold, the system will indicate that the RFID tag information is incomplete and take corresponding processing measures, such as marking the tag as abnormal, retrying to read, or notifying manual inspection. This step helps to identify and handle potential RFID tag reading errors in a timely manner, avoid process binding errors caused by incomplete data, and thus ensure the accuracy of production data and the smooth operation of the production line.

[0075] Through the above steps, the RFID equipment can evaluate the integrity of the RFID tag information based on the signal strength, ensuring that only the tag information whose signal strength meets certain standards can be bound to the process position, improving the reliability and efficiency of the RFID system, while also reducing the production error rate caused by incomplete or damaged data.

[0076] In a specific implementation process, the connection structure is a retractable structure. After detecting that the tag signal strength value of the RFID tag is less than the reference tag signal strength value, the method further includes:

[0077] Control and compare step: after controlling the retractable structure to extend by a preset step length, the tag signal strength value is acquired again, and the tag signal strength value is compared with the reference tag signal strength value;

[0078] Execute the above control comparison step at least once until the above tag signal strength value is greater than or equal to the above benchmark tag signal strength value, or, when the number of executions reaches a threshold and still does not satisfy the condition that the above tag signal strength value is greater than or equal to the above benchmark tag signal strength value, a prompt message is generated, and the prompt message indicates that the binding failed.

[0079] Specifically, the connection structure connecting the RFID antenna is designed as a retractable structure, which means that it can automatically extend or shorten within a certain range to adjust the distance between the antenna and the RFID tag. This design is used to optimize the signal reception conditions, especially when the signal strength is insufficient. When it is detected that the signal strength value of the RFID tag is less than the reference value, the device will not directly mark the tag information as incomplete or binding failure, but will first try to improve the signal reception conditions by controlling the retractable structure to extend the preset step length. Subsequently, the device obtains the tag signal strength value again and compares it with the previous reference value. The device will perform the above control comparison step at least once until the tag signal strength value reaches or exceeds the reference value, which indicates that the signal reception conditions have been optimized and the complete reading of the tag information can be ensured. In this process, the distance between the antenna and the tag is gradually adjusted to the ideal communication range. If during the execution of the control comparison step, the tag signal strength value is still lower than the reference value despite the extension of the retractable structure, and there is no improvement after the execution number reaches the set number of times, the device will generate a prompt message indicating that the binding failed this time, which usually means that the RFID tag may be damaged, poor performance or there are other problems that cannot be solved by distance adjustment. By introducing the telescopic action of the telescopic structure, the device attempts to optimize the receiving conditions when the signal strength is insufficient, thereby improving the reading success rate of the RFID tag. If the attempt fails, the device can promptly generate a prompt message of binding failure to avoid invalid operations, while also providing a basis for subsequent troubleshooting.

[0080] The advantage of this method is that it improves the flexibility and success rate of RFID tag reading, reduces reading failures caused by signal strength problems, and prevents infinite loop adjustments by setting a threshold for the number of attempts, ensuring the efficiency and stability of equipment operation. In automated production lines, this mechanism can effectively reduce the need for manual intervention and improve production efficiency and data accuracy.

[0081] During the specific implementation process, if the above-mentioned tag information is complete, the above-mentioned RFID tag is bound to the process position, including: determining whether the placement position of the above-mentioned RFID tag corresponds to the obtained commodity type code, and if so, continuing to compare whether the brand code is consistent, and binding the above-mentioned RFID tag to the process position if the above-mentioned brand code is consistent.

[0082] Specifically, first, the system needs to verify whether the placement of the RFID tag matches the read product type code. The product type code has a one-to-one correspondence with the nine-square grid position on the process board, and each grid represents a possible product type or label placement specification. The process board label placement area division diagram is as follows Figure 3 As shown, for example, the A1 grid represents the first column of the first row, which is a specific position on the process board for placing the product type code. The product type code corresponds to the serial number of the nine-square grid. In each nine-square grid, a light sensor is installed. The light sensor is used to detect whether there is a label in the grid that blocks the light, so as to determine whether the grid is placed with an RFID tag. When a label is placed in a grid, the light will be blocked, indicating that a label is placed in the grid. At this time, the sensor sends a trigger signal to inform the host computer that there is a label in the corresponding grid number. When the process board passes through the RFID device, the host computer can intelligently determine the specific position of the label (that is, which row and column of the grid it is in) according to the signal sent by the light sensor, and further control the extension and rotation of the RFID antenna to ensure that the antenna and the label are accurately aligned. The system can determine the exact position of the label (that is, the nine-square grid where it is located) through the label blocking information detected by the light sensor, and compare it with the read product type code to confirm whether the two match. If the placement position corresponds to the product type code, the system will further verify whether the brand code on the label is consistent with the expected one. The brand code is part of the RFID tag information and is used to identify the brand of the product. This step ensures that the bound RFID tag is not only associated with the correct product type, but also belongs to the expected brand, thereby avoiding process binding errors on the production line, such as binding a brand of product to another brand's process information. After confirming that the product type code and brand code are correct, the system binds the RFID tag to the process position of the current process board. The binding action means linking the product and brand information in the RFID tag with the specific processing steps on the production line, and recording it in the host computer or database for subsequent process tracking, quality control and production management.

[0083] This multi-level verification binding process improves the application accuracy of the RFID system on the automated production line, ensuring that each RFID tag is accurately associated with the corresponding process position, avoiding production confusion and product quality problems that may be caused by incorrect binding. At the same time, through the intelligent control of light sensors and host computers, the entire binding process can be completed automatically without manual intervention, significantly improving production efficiency and automation level.

[0084] During the specific implementation process, the above method also includes: indicating a binding failure when the product type code is inconsistent with the reference product type, and / or the brand code is inconsistent with the reference product brand, wherein the above reference product type corresponds to the placement position of the above RFID tag.

[0085] Specifically, the system presets the corresponding information of the benchmark commodity type and the benchmark commodity brand. These benchmark information are usually set based on the process requirements and product standards of the production line, and are used to guide and verify the correctness of the RFID tag binding. The benchmark commodity type is directly related to the placement position of the RFID tag on the process board, that is, each position (a grid in the nine-square grid) corresponds to a specific commodity type. When the RFID antenna successfully reads the tag information and determines that the information is complete, the system will further parse the commodity type code and brand code on the tag and compare it with the preset benchmark information. The commodity type code is used to confirm the type of commodity represented by the label, while the brand code is used to identify the brand of the commodity. If it is found during the comparison process that the commodity type code of the RFID tag is inconsistent with the benchmark commodity type, or the brand code is inconsistent with the benchmark commodity brand (that is, the label information does not meet the preset product standards), the system will automatically indicate that the binding has failed, which means that the commodity information identified by the RFID tag does not match the commodity information required by the current process board or process, and may involve the wrong product type or brand. Once the system indicates that the binding has failed, it will record the abnormal situation of this binding, which may include information such as the RFID tag ID, product type code, brand code, and corresponding nine-square grid position. At the same time, the system will trigger an alarm or prompt to notify the operators on the production line so that they can intervene in time to troubleshoot and correct the error. The existence of this mechanism ensures the accuracy of RFID tag binding and the traceability of products, avoids process binding errors caused by incorrect tag information, and thus improves production quality and efficiency. On an automated production line, this precise type code and brand code comparison, as well as timely error indication, is crucial to preventing production errors and improving the level of production line intelligence.

[0086] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the RFID tag identification method of the present application will be described in detail below in conjunction with specific embodiments.

[0087] This embodiment relates to a specific RFID tag identification method, such as Figure 4 As shown, a control flow chart of the RFID tag identification method is shown, including the following steps:

[0088] The antenna device is installed between two adjacent conveyor belts, and the RFID antenna is installed at the front end of the antenna device. The antenna device is rotated to the conveyor belt on either side to measure the tag signal strength value.

[0089] The process board is placed on the conveyor belt, and the RFID tag in the process board is facing directly in front of the RFID antenna;

[0090] Select several tags and put them into the tag placement area of ​​the process board, read the signal strength values ​​R1, R2, ..., Rn of n tags in turn, and calculate the average value, that is, the reference tag signal strength value R = (R1 + R2 + ... + Rn) / n;

[0091] Start the conveyor belt;

[0092] Monitor whether there are process boards flowing through the left and right sides of the RFID antenna;

[0093] If there is no process board flowing through the left and right sides of the RFID antenna, the horizontal moving structure of the antenna device remains stationary;

[0094] If a process board flows through the right side of the RFID antenna, the horizontal moving structure of the antenna device rotates to the right; if a process board flows through the left side of the RFID antenna, the horizontal moving structure of the antenna device rotates to the left;

[0095] Start the light sensor detection, the light sensor sends a sensing signal to the host computer, and the host computer controls the vertical rotation structure and the horizontal movement structure of the antenna device to move to the target grid;

[0096] Read tag information to see if the current tag signal strength value can be obtained;

[0097] If the current tag signal strength value cannot be obtained, the tag is abnormal and cannot be bound, and the process ends;

[0098] If the current tag signal strength value can be obtained, determine whether the current tag signal strength value is greater than or equal to R;

[0099] If the current tag signal strength value is greater than or equal to R, the tag information is obtained, including the product type code and brand code;

[0100] Determine whether the product type code and brand code are consistent with the preset ones;

[0101] If the product type code and brand code are consistent with the preset ones, the tag is bound and the process ends;

[0102] If the product type code and brand code are inconsistent with the preset ones, jump to "Label abnormality, cannot be bound, process ends";

[0103] If the current tag signal strength value is less than R, the retractable structure of the antenna device is controlled to extend 1 cm forward to reacquire the tag signal value;

[0104] Determine whether the current tag signal strength value is greater than or equal to R;

[0105] If the current tag signal strength value is greater than or equal to R, jump to "Get tag information, including product type code and brand code";

[0106] If the current tag signal strength value is less than R, it is determined whether the cumulative moving distance of the retractable structure exceeds 3 cm;

[0107] If the cumulative moving distance of the retractable structure does not exceed 3 cm, jump to "control the retractable structure to extend 1 cm forward and re-acquire the tag signal value";

[0108] If the cumulative moving distance of the antenna device exceeds 3cm, the process will jump to "The tag is abnormal and cannot be bound, and the process ends."

[0109] The embodiment of the present application also provides a device for RFID tag identification. It should be noted that the device for RFID tag identification of the embodiment of the present application can be used to execute the method for RFID tag identification provided by the embodiment of the present application. The device is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0110] The following is an introduction to the RFID tag identification device provided in the embodiments of the present application.

[0111] The embodiment of the present invention provides a device for RFID tag identification, such as Figure 5 As shown, including:

[0112] The first receiving control unit 51 receives a detection signal of a process board arrival detection sensor, and when the detection signal indicates that a process board has passed, controls the second stepping motor to drive the first end of the horizontal moving structure to rotate according to the position of the conveyor belt where the process board is located, so that the RFID antenna faces the conveyor belt on the side where the process board is located;

[0113] The second receiving control unit 52 receives a sensing signal from the light sensor, and controls the first stepper motor to drive the second end of the vertical rotating structure to rotate and / or the third stepper motor to drive the horizontal moving structure to move so that the RFID antenna is aligned with the RFID tag according to the sensing signal;

[0114] The acquisition and determination unit 53 acquires the tag signal strength value of the RFID tag, determines whether the tag information is complete, and binds the RFID tag to the process position if the tag information is complete.

[0115] Specifically, the host computer in the RFID device receives detection signals from the process board in place detection sensor, which indicates whether there is a process board passing through the RFID device identification area. When the detection signal confirms that there is a process board, the host computer controls the second stepper motor to drive the first end of the horizontal moving structure of the antenna device to rotate according to the conveyor belt position (left or right) where the process board is located, ensuring that the RFID antenna faces the side of the conveyor belt where the process board is located, so as to prepare for the identification of the RFID tag. The host computer also receives sensing signals from light sensors, which are distributed in the preset RFID tag placement area on the process board to detect whether the tag is in place and the specific position. According to the signal sent by the light sensor, the host computer controls the first stepper motor to drive the second end of the vertical rotating structure to rotate, and the third stepper motor to drive the horizontal moving structure to move, accurately adjusting the relative position of the RFID antenna and the RFID tag, so that the antenna can be accurately aligned with the tag to ensure the best reception of the signal. The host computer reads the signal strength value of the RFID tag, and the signal strength reflects the quality of communication between the RFID antenna and the tag. Then, the host computer determines whether the RFID tag information is complete based on the signal strength value. If the tag information is complete (that is, the signal strength is sufficient and the tag data is readable), the RFID tag is bound to the process position of the process board to complete the reading of the tag information and the recording of the product process flow; if the tag information is incomplete, the system may take remedial measures, such as adjusting the antenna position and trying again, or marking the tag as abnormal and notifying manual inspection.

[0116] The acquisition and determination unit includes:

[0117] An acquisition module, used to obtain a reference tag signal strength value;

[0118] A first determination module, configured to determine that the tag information is complete when the tag signal strength value of the RFID tag is greater than or equal to the reference tag signal strength value;

[0119] The indication module is used to indicate that the probability that the tag information is incomplete is greater than a preset probability when the tag signal strength value of the RFID tag is less than the reference tag signal strength value.

[0120] Specifically, the system needs to obtain a benchmark tag signal strength value, select several tags and place them in the tag placement area of ​​the process board, read out the signal strength values ​​R1, R2, ..., Rn of n tags in turn, and calculate the average value, that is, the benchmark tag signal strength value R = (R1 + R2 + ... + Rn) / n. Obtaining the benchmark signal strength value is the basis for evaluating the integrity of the current RFID tag information. The system compares the signal strength value of the current RFID tag read with the benchmark signal strength value. If the signal strength value of the current tag is greater than or equal to the benchmark value, it indicates that the communication quality between the RFID antenna and the tag is good and the data transmission is not significantly disturbed. When the signal strength meets the benchmark condition (i.e., greater than or equal to the benchmark value), the system determines that the RFID tag information is complete and can be further processed and bound to the process, which means that the tag data can be read and parsed accurately without missing or damaged data; on the contrary, if the current RFID tag signal strength value is less than the benchmark signal strength value, the system evaluates the probability that the tag information is incomplete. This evaluation is based on the statistical relationship between signal strength and data integrity. The preset probability may be a threshold set by experience or testing to determine to what extent the signal strength is reduced, the possibility of incomplete information will exceed the acceptable range, that is, when the signal strength is relatively low, it is not necessarily incomplete, but the probability of incompleteness is relatively high. If the estimated probability of incomplete information is greater than the preset probability threshold, the system will indicate that the RFID tag information is incomplete and take corresponding processing measures, such as marking the tag as abnormal, retrying to read, or notifying manual inspection. This step helps to identify and handle potential RFID tag reading errors in a timely manner, avoid process binding errors caused by incomplete data, and thus ensure the accuracy of production data and the smooth operation of the production line.

[0121] The connection structure is a retractable structure. After detecting that the tag signal strength value of the RFID tag is less than the reference tag signal strength value, the acquisition and determination unit further includes:

[0122] The control comparison module is used to control the retractable structure to extend by a preset step length to obtain the tag signal strength value again, and compare the tag signal strength value with the reference tag signal strength value.

[0123] Specifically, the connection structure connecting the RFID antenna is designed as a retractable structure, which means that it can automatically extend or shorten within a certain range to adjust the distance between the antenna and the RFID tag. This design is used to optimize the signal reception conditions, especially when the signal strength is insufficient. When it is detected that the signal strength value of the RFID tag is less than the reference value, the device will not directly mark the tag information as incomplete or binding failure, but will first try to improve the signal reception conditions by controlling the retractable structure to extend the preset step length. Subsequently, the device obtains the tag signal strength value again and compares it with the previous reference value. The device will perform the above control comparison step at least once until the tag signal strength value reaches or exceeds the reference value, which indicates that the signal reception conditions have been optimized and the complete reading of the tag information can be ensured. In this process, the distance between the antenna and the tag is gradually adjusted to the ideal communication range. If during the execution of the control comparison step, the tag signal strength value is still lower than the reference value despite the extension of the retractable structure, and there is no improvement after the execution number reaches the set number of times, the device will generate a prompt message indicating that the binding failed this time, which usually means that the RFID tag may be damaged, poor performance or there are other problems that cannot be solved by distance adjustment. By introducing the telescopic action of the telescopic structure, the device attempts to optimize the receiving conditions when the signal strength is insufficient, thereby improving the reading success rate of the RFID tag. If the attempt fails, the device can promptly generate a prompt message of binding failure to avoid invalid operations, while also providing a basis for subsequent troubleshooting.

[0124] The acquisition and determination unit further includes:

[0125] The second determination module determines whether the placement position of the RFID tag corresponds to the obtained commodity type code. If so, the brand code is compared to see if they are consistent. If the brand code is consistent, the RFID tag is bound to the process position.

[0126] Specifically, the system needs to verify whether the placement of the RFID tag matches the read product type code. The product type code has a one-to-one correspondence with the nine-square grid position on the process board, and each grid represents a possible product type or label placement specification. The process board label placement area division diagram is as follows Figure 3As shown, for example, the A1 grid represents the first column of the first row, which is a specific position on the process board for placing the product type code. The product type code corresponds to the serial number of the nine-square grid. In each nine-square grid, a light sensor is installed. The light sensor is used to detect whether there is a label in the grid that blocks the light, so as to determine whether the grid is placed with an RFID tag. When a label is placed in a grid, the light will be blocked, indicating that a label is placed in the grid. At this time, the sensor sends a trigger signal to inform the host computer that there is a label in the corresponding grid number. When the process board passes through the RFID device, the host computer can intelligently determine the specific position of the label (that is, which row and column of the grid it is in) according to the signal sent by the light sensor, and further control the extension and rotation of the RFID antenna to ensure that the antenna and the label are accurately aligned. The system can determine the exact position of the label (that is, the nine-square grid where it is located) through the label blocking information detected by the light sensor, and compare it with the read product type code to confirm whether the two match. If the placement position corresponds to the product type code, the system will further verify whether the brand code on the label is consistent with the expected one. The brand code is part of the RFID tag information and is used to identify the brand of the product. This step ensures that the bound RFID tag is not only associated with the correct product type, but also belongs to the expected brand, thereby avoiding process binding errors on the production line, such as binding a brand of product to another brand's process information. After confirming that the product type code and brand code are correct, the system binds the RFID tag to the process position of the current process board. The binding action means linking the product and brand information in the RFID tag with the specific processing steps on the production line, and recording it in the host computer or database for subsequent process tracking, quality control and production management.

[0127] The second determination module includes:

[0128] The indication submodule is used to indicate binding failure when the commodity type code is inconsistent with the reference commodity type and / or the brand code is inconsistent with the reference commodity brand, wherein the reference commodity type corresponds to the placement position of the RFID tag.

[0129] Specifically, the system presets the corresponding information of the benchmark commodity type and the benchmark commodity brand. These benchmark information are usually set based on the process requirements and product standards of the production line, and are used to guide and verify the correctness of the RFID tag binding. The benchmark commodity type is directly related to the placement position of the RFID tag on the process board, that is, each position (a grid in the nine-square grid) corresponds to a specific commodity type. When the RFID antenna successfully reads the tag information and determines that the information is complete, the system will further parse the commodity type code and brand code on the tag and compare it with the preset benchmark information. The commodity type code is used to confirm the type of commodity represented by the label, while the brand code is used to identify the brand of the commodity. If it is found during the comparison process that the commodity type code of the RFID tag is inconsistent with the benchmark commodity type, or the brand code is inconsistent with the benchmark commodity brand (that is, the label information does not meet the preset product standards), the system will automatically indicate that the binding has failed, which means that the commodity information identified by the RFID tag does not match the commodity information required by the current process board or process, and may involve the wrong product type or brand. Once the system indicates that the binding has failed, it will record the abnormal situation of this binding, which may include information such as the RFID tag ID, product type code, brand code, and corresponding nine-square grid position. At the same time, the system will trigger an alarm or prompt to notify the operators on the production line so that they can intervene in time to troubleshoot and correct the error. The existence of this mechanism ensures the accuracy of RFID tag binding and the traceability of products, avoids process binding errors caused by incorrect tag information, and thus improves production quality and efficiency. On an automated production line, this precise type code and brand code comparison, as well as timely error indication, is crucial to preventing production errors and improving the level of production line intelligence.

[0130] The RFID tag recognition device includes a processor and a memory. The first receiving control unit, the second receiving control unit, the acquisition determination unit, etc. are all stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions. The modules are all located in the same processor; or, the modules are located in different processors in any combination.

[0131] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0132] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0133] Applying the technical solution of the present application, the antenna device includes a vertical rotation structure, a horizontal movement structure, a first stepper motor, a second stepper motor, a third stepper motor, a connecting structure and an RFID antenna, wherein the first end of the horizontal movement structure is movably connected to the first end of the vertical rotation structure, the first end of the connecting structure is fixed on the horizontal movement structure, the RFID antenna is installed at the second end of the connecting structure, the first stepper motor drives the second end of the vertical rotation structure to rotate, the second stepper motor drives the first end of the horizontal movement structure to rotate, and the third stepper motor drives the horizontal movement structure to move. In this scheme, first, a detection signal of a process board arrival detection sensor is received, and when the detection signal indicates that a process board has passed, the second stepper motor is controlled to drive the first end of the horizontal moving structure to rotate according to the position of the conveyor belt where the process board is located, so that the RFID antenna faces the conveyor belt on the side where the process board is located, and then, a sensing signal of the light sensor is received, and the first stepper motor is controlled to drive the second end of the vertical rotating structure to rotate and / or the third stepper motor is controlled to drive the horizontal moving structure to move according to the sensing signal so that the RFID antenna is aligned with the RFID tag, and finally, the tag signal strength value of the RFID tag is obtained, and it is determined whether the tag information is complete and the RFID tag is bound to the process position if the tag information is complete, thereby solving the problem that the antennas of adjacent conveyor belts are easily interfered with each other in the current RFID identification technology.

[0134] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the RFID tag identification method.

[0135] Specifically, the method for RFID tag identification includes: receiving a detection signal from a process board arrival detection sensor, and when the detection signal indicates that a process board has passed, controlling the second stepper motor to drive the first end of the horizontal moving structure to rotate according to the position of the conveyor belt where the process board is located, so that the RFID antenna faces the conveyor belt on the side where the process board is located; receiving a sensing signal from a light sensor, and controlling the first stepper motor to drive the second end of the vertical rotating structure to rotate and / or the third stepper motor to drive the horizontal moving structure to move according to the sensing signal so that the RFID antenna is aligned with the RFID tag; obtaining the tag signal strength value of the RFID tag, and determining whether the tag information is complete and binding the RFID tag to the process position if the tag information is complete.

[0136] An embodiment of the present invention provides a device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, at least the following steps are implemented: receiving a detection signal from a process board arrival detection sensor, and when the detection signal indicates that a process board has passed, controlling a second stepper motor to drive a first end of a horizontal moving structure to rotate according to a position of a conveyor belt where the process board is located, so that an RFID antenna faces the conveyor belt on the side where the process board is located; receiving a sensing signal from a light sensor, and controlling a first stepper motor to drive a second end of a vertical rotating structure to rotate and / or a third stepper motor to drive the horizontal moving structure to move according to the sensing signal so that the RFID antenna is aligned with the RFID tag; obtaining a tag signal strength value of the RFID tag, and determining whether the tag information is complete, and binding the RFID tag to a process position if the tag information is complete.

[0137] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna device, characterized in that: include: A vertical rotating structure, a horizontal moving structure, a first stepping motor, a second stepping motor, a third stepping motor, a connecting structure and an RFID antenna, Among them, the first end of the horizontal moving structure is movably connected to the first end of the vertical rotating structure, the first end of the connecting structure is fixed on the horizontal moving structure, the RFID antenna is installed on the second end of the connecting structure, the first stepper motor drives the second end of the vertical rotating structure to rotate, the second stepper motor drives the first end of the horizontal moving structure to rotate, and the third stepper motor drives the horizontal moving structure to move.

2. The antenna device according to claim 1, characterized in that The antenna device further comprises: A first gear and a second gear meshing with each other, the first gear being mounted at the bottom of the horizontal moving structure, and the third stepping motor driving the second gear to rotate to drive the first gear to drive the horizontal moving structure to move.

3. The antenna device according to claim 1 or 2, characterized in that: The connecting structure is a retractable structure.

4. An RFID device, characterized in that: include: The antenna device according to any one of claims 1 to 3, installed between two adjacent conveyor belts; An RFID tag is placed in a process plate on the conveyor belt; A process board in-place detection sensor, used for detecting the process board in-place; A light sensor, used to detect the placement position of the RFID tag; The host computer communicates with the antenna device and the process board arrival detection sensor respectively, and is configured to obtain the tag information and process the tag information.

5. The RFID device according to claim 4, characterized in that: There are multiple light sensors, and the multiple light sensors are respectively placed at multiple positions where RFID tags are pre-placed.

6. A method for RFID tag identification using the RFID device according to claim 4 or 5, characterized in that: include: Receive a detection signal from a process board arrival detection sensor, and when the detection signal indicates that a process board has passed, control the second stepper motor to drive the first end of the horizontal moving structure to rotate according to the position of the conveyor belt where the process board is located, so that the RFID antenna faces the conveyor belt on the side where the process board is located; receiving a sensing signal from the light sensor, and controlling the first stepper motor to drive the second end of the vertical rotating structure to rotate and / or the third stepper motor to drive the horizontal moving structure to move according to the sensing signal so that the RFID antenna is aligned with the RFID tag; The tag signal strength value of the RFID tag is obtained, and it is determined whether the tag information is complete and the RFID tag is bound to the process position if the tag information is complete.

7. The method according to claim 6, characterized in that Determining whether the label information is complete includes: Get the signal strength value of the benchmark tag; In a case where the tag signal strength value of the RFID tag is greater than or equal to the reference tag signal strength value, determining that the tag information is complete; In the case where the tag signal strength value of the RFID tag is less than the reference tag signal strength value, it indicates that the probability that the tag information is incomplete is greater than a preset probability.

8. The method according to claim 7, characterized in that The connection structure is a retractable structure. After detecting that the tag signal strength value of the RFID tag is less than the reference tag signal strength value, the method further includes: Control and compare step: controlling the retractable structure to extend by a preset step length to obtain the tag signal strength value again, and comparing the tag signal strength value with the reference tag signal strength value; Execute the control comparison step at least once until the tag signal strength value is greater than or equal to the benchmark tag signal strength value, or, when the number of executions reaches a threshold and the tag signal strength value is still not greater than or equal to the benchmark tag signal strength value, generate a prompt message indicating a binding failure.

9. The method according to claim 6, characterized in that When the tag information is complete, the RFID tag is bound to the process position, including: Determine whether the placement position of the RFID tag corresponds to the obtained commodity type code. If so, continue to compare whether the brand code is consistent. If the brand code is consistent, bind the RFID tag to the process position.

10. The method according to claim 9, characterized in that The method further comprises: When the commodity type code is inconsistent with the reference commodity type, and / or the brand code is inconsistent with the reference commodity brand, a binding failure is indicated, wherein the reference commodity type corresponds to the placement position of the RFID tag.

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